In kinetic theory of gases it is assumed that there is no force between molecules But there is actually intermolecular attraction which reduces... View Article
Water at room temperature is liquid due to the presence of hydrogen bond.  These bonds hold water molecules together for small fractions of a... View Article
Adrenaline is secreted by the adrenal medulla. It mainly acts on smooth muscles, cardiac muscles, blood vessels, skeletal muscles and fat cells.... View Article
This is because of resonance. When a body is subjected to forced vibration with a frequency which equal to or an integral multiple of the natural... View Article
Speed-Time Graphs look much like Distance-Time graph. Time is plotted on the X-axis. Speed or velocity is plotted on the Y-axis A straight... View Article
The velocity of football changes four times. First, when a football player kicks to another player, second when that player kicks the football to... View Article
It is difficult to hold a school bag having a thin strap because the pressure on the shoulders is quite large. This is because the pressure is... View Article
Induced movement or induced motion is an illusion of visual perception in which a stationary or a moving object appears to move or to move... View Article
Option (a) Cellulose Cellulose shows the presence of intra molecule hydrogen bonding in them. This is due to the fact that the Glucose monomers... View Article
Answer: Newton's first law of motion is also known as the law of inertia. Newton's first law of motion states that an object in rest or in... View Article
Let the initial charges be q1 and q2 respectively. After they come in contact, the charges are rearranged such that they acquire same charge.... View Article
The ray of light bends towards the normal. The light ray bends towards the normal. When a light ray enters from an optically rarer medium... View Article
A copper ball of mass 100 gm is at a temperature T. It is dropped in a copper calorimeter of mass 100 gm, filled with 170 gm of water at room... View Article
Answer: Work is said to be done when a force applied to an object moves that object. Work done is generally referred to in relation to the force... View Article
Puberty is when a child's body begins to develop and change as they become an adult. At the time of puberty, secondary sexual characters develop,... View Article
Steroid hormones are lipophilic in nature. The lipids present in the cell membranes do not prohibit the entry of lipophilic molecules in the... View Article
Displacement reaction is a reaction in which an atom, or a group of atoms, present in a molecule is displaced by another atom. The reaction... View Article
No, we cannot say that there is a better body design as these organisms evolved according to their needs to survive in the environment. If a... View Article